VOD - Redirect a user from a url to a new path

I was reading through this forum thread and the last post points to what I need to do. I need to resolve a file location from a DB for VOD and I need to take a custom URL that is sent to a client from elsewhere and then resolve it to the correct URL for live.

I have started with live and I would like take a url from a client and point to a video coming over a udp connection like I was able to do with the .stream file. After looking at the thread I mentioned above I am coming to the understanding that the .stream files cannot be used with IMediaStreamNameAliasProvider2. If this is the case how would I take a stream name and point it to a udp URL without using the .stream file?

Thank you for your help so far Richard. After I have live working I will move on to VOD.